Abstract
Abstract Synchrosqueezing is a strategy to enhance the resolution of time-frequency analysis. However, its application in the S-transform leads to complexities due to the variable phase spectrum of the S-transform, resulting in a decrease in resolution and an increase in complexity. This work proposes an Synchrosqueezing Generalized S-Transform (SS-GPST) by introducing phase-shifting and a generalized parameter to simplify the mathematical definition and enhance resolution. Synthetic data trials demonstrate the superiority of SS-GPST over existing synchrosqueezing methods, offering enhanced resolution and minimized inverse transformation errors. In practical ground-penetrating radar applications, we have applied SS-GPST to identify the reinforcement protection layer in tunnel linings. The results show that SS-GPST offers a novel method for thin-layer extraction in ground-penetrating radar applications.
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